临界压力

The thermodecomposition of Li〓CO〓 charge was experimented and studied in a specially made vacuum furnace. The relationship of decomposition rate with temperature, pressure and time were obtained. The important principle of decomposition rate effected by pressure was acquired and conception of critical decomposition-pressure was presented.

在特制的真空炉内对碳酸锂物料真空分解进行了试验，得到了分解率与温度、压力、时间的关系；得到了分解率受压力影响的重要规律，据此提出了分解临界压力的概念，总结出了分解临界压力与温度的关系。

Pressure characteristics and condition of cavitation incipience were analyzed.

在沿固体表面法线方向减速运动阶段，由于液体离开固体表面的惯性使得液体与固壁面间产生低压，当固体表面运动加速度超过某个临界值时，液体因压力低于空化临界压力而发生空化，空化与固体表面结构及液体流动特性有关。

Isobutane has a specific gravity of 0.56, a boiling point of 11°F at 14.7 psi, a vapor pressure of 72 psia at 100°F, a critical temperature of 275°F, and a critical pressure of 529 psia.

异丁烷的相对密度为0.56，在14.7磅/平方英寸压力下的沸点为11°F，在100°F温度下的蒸气压力72磅/平方英寸，临界温度为275°F，临界压力为529磅/平方英寸。

The optimum reaction conditions were found finally. The results showed that the suitable conditions are under methanol solvent reaction temperature 40℃,the concentration of catalyzer TS-1 0.6%.,reaction time 60 minutes,propylene pressure 0.4Mpa under methanol solvent.Under Supercritical fluid system,the reaction temperature was 33.7℃(supercritical and near critical temperature),the reaction pressure was 7.58Mpa(near critical pressure and critical pressure range. propylene ), propylene pressure 0.65Mpa, reaction time 45min, cosolvent molality 4%.

而超临界体系下反(来源：4e56ABC论文网www.abclunwen.com)应温度适宜在近超临界和临界温度(33.7℃)以上，反应压力也是接近临界压力或者处于临界压力范围(7.58Mpa)，丙烯压力是0.65Mpa，反应时间45min，共溶剂甲醇摩尔浓度4%，在此反应条件下，反应的转化率98%，选择性96%，收率94%，与传统条件相比较，收率提高了20%左右。

The saturated liquid densities of HFC227ea and the vapor-liquid coexistence curve were measured, the critical temperature and critical density were determined by the critical opalescence phenomenon, and then the critical pressure was determined by vapor pressure equation.

测量了HFC-227ea饱和液体密度和临界区的气液共存线，确定了HFC-227ea的临界温度、临界压力、临界密度；推算了HFC-227ea的饱和气体密度，并验证了其可信度；关联了饱和气液密度，提出了高精度的HFC-227ea饱和气液密度关联式；关联了临界区气液共存线，可精确再现HFC-227ea临界区性质，并根据临界幂定律导出了HFC-227ea的临界指数和临界幅值。

The critical parameters were determined as ρc = 442± 4kg/ m3, TC = 346.16 ± 0.05K and pc = 3.781± 0.006MPa by observing the disappearance of vapor-liquid meniscus and the critical opalescence .

基于汽液界面消失位置和临界乳光现象，测定了临界密度ρ_c=442±4kg/m~3、临界温度T_c=346.16±0.05K，由本文蒸汽压方程算出临界压力ρ_c=3.781±0.006MPa。

The sample is subjected to primary dispersion by a primary dispersion flow that reaches a critical pressure and a subsonic speed, and the sample is then subjected to a secondary dispersion by a secondary dispersion flow that is different in direction from the primary dispersion flow and that reaches a critical pressure and a subsonic speed.

该试样受到达到临界压力和亚音速的初次分散流的初次分散，然后试样接受与初次分散流方向不同且达到临界压力和亚音速的二次分散流的二次分散。

The article covers the full research on such aspects as mathematic description, numerical analysis method and their practical applications. The diphase heating surface is divided into a hot water section, a evaporation section and a micro overheat section , the problems of model switching are avoided successfully between subcritical and supercritical working condition in the model of The diphase heating surface, and the model can be used for between subcritical and supercritical working condition without causing the model stiff infinity prick up problem. The mathematical model and dynamic characteristic account is unified and predigested for the diphase heating surface of once—through boiler under subcritical and supercritical pressure, and propose that the working conditions at phase change point could be used as divide criterion between water region and steam region under supercritical pressure, the problems are solved successfully between water and steam phase change point under supercritical pressure.

本文在过程的数学描述、数值分析以及实际应用等方面进行了系统的研究分析，将双相受热面统一划分为热水段、蒸发段和微过热段三段，所建立的双相受热面模型不但成功地避免了超临界工况与亚临界工况间的模型切换，而且消除了由区段划分欠妥所引起的模型刚性无限加剧的问题，统一并简化了超临界及亚临界压力下直流锅炉双相区段的数学模型和动态特性计算，而且提出了利用相变点工况作为超临界压力下划分汽水区域的标准，解决了超临界压力下水与蒸汽的相变点问题。

The pressure drop along the horizontal wellhole was combined with the critical pressure drop of the bottom water-driven reservoirs, thus the relation between the critical pressure and the critical flow rate when the horizontal well originally put into production was researched,which provide a reference for the design.of the deliverability of the horizontal well used in the bottom water reservoir existing the bottom water coning.

把水平段压降和底水油藏临界压力结合起来，研究了考虑水平段压降时的水平井初期生产的临界压力和临界产量的关系，为存在底水锥进油藏水平井产能设计提供了参考依据。

Be able to explode ignites （3000Till 4000 ℃,This also is living over-dose air and the numeric value when possesing remains waste gas only ,In case according to the ideal air/fuel ratio layout ,There is not waste gas ,The temperature gathering is taller ）Oil30 grams may be cause （90℃ tail gas preheats ）Steamization （Vaporization heat 2282.7J\g ）……At the respect of the pressure swelling ,Even if being in the critical of water （374℃）Condition ,Critical pressure 21.83MPa of water 、Carbon dioxide critical（31.1℃）Pressure 7.38MPa also is some -fold of a rule piston style explosive motor pressure 5--9MPa （Dalton's Law or the Law of Additive pressures）……For emploing the capacity means difference ,Therefore the composition is different as black and white .

一克爆燃（3000至4000摄氏度，这也只是在过量空气和有残余废气时的数值，如果按理想空燃比配置，没有废气，温度会更高）的油可以使30克（90摄氏度尾气预热）的水汽化（汽化热2282.7J\g）……从膨胀压力方面来说，即使处于水的临界（374摄氏度）状态，水的临界压力21.83MPa、二氧化碳的临界（31.1摄氏度）压力7。 38MPa也是常规活塞式内燃机压力5--9MPa的几倍（压力叠加定律，道尔顿定律）……因为用能方式不同，所以结构就截然不同。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了